[Libguestfs] [PATCH libnbd v3 0/3] copy: Use preferred block size for copying

[Richard W.M. Jones]

v2 was:
https://listman.redhat.com/archives/libguestfs/2022-June/029321.html

v3:

 - adds a test

 - force sparseness detection size to be at least as large as the
   target preferred size (otherwise you end up creating sub-requests
   which are smaller than the preferred size)

Rich.